使用自定义视图填充ListFragments？

Question

以前，我没有将布局膨胀为ListView的自定义视图层次结构的问题。但我不知道如何为listFragment做同样的事情。比方说，我有一个item_list布局，里面有一个ImageView和2个textview。我想膨胀这在我的ListFragment中使用。但是怎么样？

public class Tab1Fragment extends ListFragment { 
private LayoutInflater mInflater; 
private Vector<RowData> data; 
RowData rd; 

static final String[] title = new String[] { 
    "Classic Plank", "Side Plank", "Reversed Plank", "Swissball Plank", "One Arm One Leg", //5 
    }; 

static final String[] description = new String[] { 
    "Variation of Sushis from fresh vegetables and seafoods! Good for family occassions!", 
    "Oyakodon is a Japanese Rice Bowl dish with Chicken, Eggs and various sorts of healthy and delicious Veggetables!", 
    "Japanese assorted Pancake that is made from many different ingredients. The taste is so delicious!", 
    "Japanese Dumplings made of Rice Flour. This is one of the healthiest sweets in Japan!", 
    "Japanese assorted stews. Made from many different kind of veggetables. Popular in Winter!", //5 
    }; 

private Integer[] imgid = { 
R.drawable.thumb_classic, R.drawable.thumb_side, R.drawable.thumb_reverse,  R.drawable.thumb_swissball, R.drawable.thumb_reachout, //5 
}; 

@Override 
public void onCreate(Bundle savedInstanceState) { 
super.onCreate(savedInstanceState); 
setContentView(R.layout.easylist); 
mInflater = (LayoutInflater) getSystemService(Activity.LAYOUT_INFLATER_SERVICE); 
data = new Vector<RowData>(); 
for(int i=0;i<title.length;i++){ 
    try { 
     rd = new RowData(i,title[i],description[i]); 
     } catch (ParseException e) { 
      e.printStackTrace(); 
      } 
    data.add(rd); 
    } 
CustomAdapter adapter = new CustomAdapter(this, R.layout.list_item_main, android.R.id.list, data); 
    setListAdapter(adapter); 
    getListView().setTextFilterEnabled(true); 
} 


private void setContentView(int main) { 
// TODO Auto-generated method stub 

} 


private LayoutInflater getSystemService(String layoutInflaterService) { 
// TODO Auto-generated method stub 
return null; 
} 


public void onListItemClick(ListView listView, View view, int position, long id) { 
Bundle bundle = new Bundle(); 
bundle.putInt("Layout", position); 

Intent newIntent = new Intent(this.getApplicationContext(), ContentViewer.class); 
newIntent.putExtras(bundle); 
startActivityForResult(newIntent, 0); 
} 
    private Context getApplicationContext() { 
// TODO Auto-generated method stub 
return null; 
} 
private class RowData { 
    protected int mId; 
    protected String mTitle; 
    protected String mDescription; 
    RowData(int id, String title, String description){ 
    mId=id; 
    mTitle = title; 
    mDescription = description; 
} 
    @Override 
    public String toString() { 
      return mId+" "+mTitle+" "+mDescription; 
    } 
} 
    private class CustomAdapter extends ArrayAdapter<RowData> { 

    public CustomAdapter(Context context, int resource, int textViewResourceId, List<RowData> objects) {    

super(context, resource, textViewResourceId, objects); 
} 
@Override 
    public View getView(int position, View convertView, ViewGroup parent) { 

    ViewHolder holder = null; 
    TextView title = null; 
    TextView description = null; 
    ImageView thumbnail = null; 
    RowData rowData = getItem(position); 
    if(null == convertView){ 
     convertView = mInflater.inflate(R.layout.list_item_main, null); 
     holder = new ViewHolder(convertView); 
     convertView.setTag(holder); 
} 
     holder = (ViewHolder) convertView.getTag(); 
     title = holder.gettitle(); 
     title.setText(rowData.mTitle); 

     description = holder.getdescription(); 
     description.setText(rowData.mDescription); 

     thumbnail = holder.getImage(); 
     thumbnail.setImageResource(imgid[rowData.mId]); 
     return convertView; 
} 
     private class ViewHolder { 
     private View mRow; 
     private TextView title = null; 
     private TextView description = null; 
     private ImageView thumbnail = null; 

     public ViewHolder(View row) { 
     mRow = row; 
} 
    public TextView gettitle() { 
     if(null == title){ 
      title = (TextView) mRow.findViewById(R.id.title); 
      } 
     return title; 
    }  

    public TextView getdescription() { 
     if(null == description){ 
       description = (TextView) mRow.findViewById(R.id.description); 
       } 
     return description; 
    } 

    public ImageView getImage() { 
     if(null == thumbnail){ 
       thumbnail = (ImageView) mRow.findViewById(R.id.thumbnail); 
            } 
      return thumbnail; 
    } 
}    
} 
} 

Answer 1

我不记得肯定，如果这是当我有什么就解决了这个问题，但我不认为你是以下片段生命周期（看到here）正确。

在谈论某项活动时，您必须首先创建您的ListView，然后再拨打电话setAdapter()。您正在执行onCreate()，这是在onCreateView()之前调用的。

所以它看起来好像你在本质上试图在你创建它之前设置你的ListView的适配器。

作为一种习惯，最好始终在片段生命周期的onCreateView()部分内完成所有工作。